Psoas Minor - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The psoas minor is a muscle of the posterior abdominal wall. It is a long thin muscle, located anterior to the psoas major. It is only present in 60% of the population. Attachments: Originates from the vertebral bodies of T12 and L1 and attaches to a ridge on the superior ramus of the pubic bone, known as the pectineal line. Actions: Flexion of the vertebral column. Innervation: Anterior rami of the L1 spinal nerve. Blood supply: Lumbar arteries. By TeachMeSeries Ltd (2026) Fig 1Muscles of the posterior abdominal wall. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the psoas minor muscle? The psoas minor is a slender muscle located in the posterior abdominal wall, positioned anterior to the psoas major. It is present in approximately 60% of individuals. What are the attachments of the psoas minor? The psoas minor originates from the vertebral bodies of T12 and L1, and it attaches to the pectineal line on the superior ramus of the pubic bone. What is the primary action of the psoas minor? The main action of the psoas minor is to flex the vertebral column. This function contributes to movements such as bending forward. How is the psoas minor innervated? The psoas minor is innervated by the anterior rami of the L1 spinal nerve, which provides the necessary neural input for its function. What is the blood supply to the psoas minor? The psoas minor receives its blood supply from the lumbar arteries, which ensure adequate perfusion for the muscle's metabolic needs. Rate This Article